<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-on指令</title>
</head>
<body>
    <div id="app">
        <input type="button" value="v-on指令" v-on:click="doIt">
        <input type="button" value="v-on简写" @click="doIt">
        <input type="button" value="双击事件" @dblclick="doIt">
        <h2 @click="changeStudy">{{ study }}</h2>
    </div>
    <!-- 1.开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el:"#app",
            data:{
                study:"hello"
            },
            methods: {
                doIt:function(){
                    alert("学习vue.js");
                },
                changeStudy:function(){
                    this.study+="vue.js!"
                }
            },
        })
    </script>
</body>
</html>